【正文】
點(diǎn)E、F之前的紋波是由換向器引起的紋波。,因?yàn)楹雎粤穗姌须姼小Q向器紋波等因素的影響。直流電機(jī)裝置的一個(gè)特征就是需要供電的負(fù)載時(shí)電阻、電導(dǎo)的混合,晶閘管電流應(yīng)換向?yàn)榱恪#▏?yán)格的講,圖1系統(tǒng)中反饋信號(hào)只有當(dāng)電樞電組的壓降IaRa很小時(shí),才與軸轉(zhuǎn)速成正比的電樞電壓成正比。整流器BR1給并聯(lián)勵(lì)磁繞組提供一個(gè)穩(wěn)定電壓,產(chǎn)生穩(wěn)定的磁通。后者是不可能的,因此只可通過(guò)電樞電壓的變化來(lái)減低轉(zhuǎn)速。所有直流電機(jī)速度控制的基本關(guān)系都可以由下式得出:E∝Φω U=E+IaRa 各項(xiàng)就是它們通常所指的含義。任何電機(jī)都可以通過(guò)突然反接電源以提供反向的旋轉(zhuǎn)方向(反接制動(dòng))來(lái)停機(jī)。保持磁場(chǎng)電壓,施加制動(dòng)降到最低速。渦流制動(dòng)可用于任何機(jī)器,只要在軸上安裝一個(gè)銅條或鋁盤(pán)并在磁場(chǎng)中旋轉(zhuǎn)它即可。假如電源系統(tǒng)具有足夠的容量,在短時(shí)回饋過(guò)程中最終引起的端電壓升高會(huì)很少。(4)反向(接)制動(dòng)。一個(gè)小型速度控制系統(tǒng)(例如所知的伺服積分器)可以采取機(jī)械制動(dòng),但這對(duì)大型速度控制器并不可行,因?yàn)樯岷茈y并且很昂貴。一個(gè)電壓調(diào)節(jié)器必須也保持負(fù)載電流值變化時(shí)輸出電壓恒定。第五篇:電氣自動(dòng)化專(zhuān)業(yè)英語(yǔ)14章翻譯14章 直流電機(jī)速度控制 調(diào)節(jié)系統(tǒng)調(diào)節(jié)系統(tǒng)是一類(lèi)通常能提供穩(wěn)定輸出功率的系統(tǒng)。電氣設(shè)備維修,工儀表開(kāi)發(fā)與銷(xiāo)售。我知道自己的能力還不夠,我愿加入貴公司繼續(xù)學(xué)習(xí),努力提高自己的工作能力。我來(lái)自農(nóng)村,是一個(gè)責(zé)任心強(qiáng),善始善終,辦事認(rèn)真,肯吃苦的人。我知道自己的能力還不夠,我愿加入貴公司繼續(xù)學(xué)習(xí),努力提高自己的工作能力。我來(lái)自農(nóng)村,是一個(gè)責(zé)任心強(qiáng),善始善終,辦事認(rèn)真,肯吃苦的人。s basketball championship in school students were hired as the sportsdepartment, Deputy Minister ofIn June 20xx the school of electrical technology to obtain professional credentialsIn June 20xx in the school to obtain vocational qualification certificate ElectricianLanguage Proficiency: Mandarin: fluent English: 2Professional skills: am the 20xx graduates, after three years of training in schools, the munity has a certain deGREe of adaptability, professionalism and strong sense of responsibility, diligence, meticulous and prehensive analysis of strong ability and learning school, I attended the school of professional training, such as: 7assembled radios, electronic form design simple curriculum design, electrician, electrical technology applications, such as training, and obtain the relevant the classroom, I have also systematically studied the principle o